This advert, from 1933, features BGA bicycles fitted with Cyclo gears. As yet, there is no mention of BGA's own Velectrik derailleur.

(Source gallica.bnf.fr/ Bibliothèque nationale de France)

• Publisher: Le Forez Sportif
• Country: France
• Date: August 1933
• Derailleur brands: BGA, Cyclo
• Derailleurs: Le Cyclo, Cyclo Witmy